Screwdriver



J. PEYER.

SCREWDRIVE'R.

APPLICATION FILED SEPT. Is. 1919;

Patented Apr. 19, 1921..

. INVENTOR fihnfeyer.

WITNESSES vireo sures .JOHIN' IE'EYER, 0F BROOKLYN, NEW YORK.

SCREWDRIVER.

Application filed September 18, 1919.

To all whom it may concern: 5

Be it known that I, JOHN PEYER, a citizen of the United States, and aresident of the city of New York, borough of Brooklyn, county of Kings,and State of New York, have invented a new and useful Improvement inScrewdrivers, of which the following is a full, clear, and exactdescription.

This invention relates to tools and more particularly to a type of toolhaving a handle separable from the tool proper. The present inventionrelates still more particularly, and descriptively to a screw driverhaving a handle and shank which is separable one from the other.

An object of the invention is to provide a screw driver comprising ahandle separable. from the screw driver shank or bit. It is a purpose todisclose a tool for metal or wood working mechanics of which the bit. orshank of the tool is removable from the handle in order to reinsertwithin the handle a smaller or a larger tool in order to adapt the toolto the particular work at hand.

It is a further object of this invention to provide a tool handle designwhich may be used in connection with various kinds of tools such asscrew drivers, chisels, punches, awls, reamers, and various other kindsof tools where it is desirable to employtools of divers sizes andshapes, and where it is desirable to have a standard handle adapted foreach of the said tools.

With the above principal objects and others in view, the inventionrelates to the several tool designs as disclosed in the appended claim,as described in the following specification, and one practical exampleof which is portrayed in the accompanying drawings, wherein:

Figure 1 illustrates a tool, such as a screw driver in elevation; andFig. 2 illustrates a longitudinal sectional view of this tool where thehandle is in section and the tool proper or shank" is in elevation,

Fig. 3 shows a sectional view taken. on the line 3-3 of Fig. 2; and Fig.4 shows a sectional view taken on the linedl of Fig. 2.

Referring now more in particular to the drawings, the numeral 6designates a tool handle appropriately shaped to fit the mechanics orworkmans hand. This handle may be made of any appropriate material, itbeing preferable to employ metal where Specification of Letters Patent.

Patented Apr. 19, 1921. Serial No. 324,435.

the tool is used for rough and heavy work. This will enable the mechanicto use a mallet or hammer against the tool handle and drive i the toolagainst the work without material damage. The handle is drilled at theone end to leave a longitudinal bore 7. Likewise the handle is drilledat the base of the longitudinal bore to provide a transverse bore 8. Thelongitudinal bore 7 at its juncture with the transverse bore 8 isprovided with an upstanding rib constituting a shoulder 10. The bore 7is cylindric in shape and does not depend upon conicity of shape to holda tool shank in the bore or socket of the handle such as is the casewith many forms of tools employing separable tool handles. 7

The tool shank 11 is provided with a short tapered end 12 and anoppositely disposed flat beveled surface 14 affording a clearance spacebetween the wall of the bore 7 and said beveled surface.

A locking pin 15 is inserted in a hole formed transversely of the bore 7which disposes said pin across the clearance space formed between thecylindrical wall of the handle and the flat beveled surface of the toolshank. It may be preferable to so fit the pin into the handle across thebore, that the axis of the pin will be about tangent to thecircumference of the socket bore. By this arrangement approximately onehalf of the periphery of the pin 15 will be exposed within thelongitudinal bore 7 whereby upon insertion of the tool shank 11, africtional engagement and gripping action will be effected between thepin and the beveled surface 141 of the shank, which gripping ac-' tionwill be further augmented by engagement of the tapered end 12 of theshank with the beveled surface of the shoulder 10.

To remove the tool, the operator may insert a punch or other suitabletool through the hole 8 and exert a prizing movement against the end 12of the shank which loosens the shank from its seated position againstthe pin and permits the removal of the tool shank from the handle. Toapply the tool to the handle, the operator inserts the tapered end 12into the bore 7 with the beveled surface 14 disposed toward the side ofthe bore traversed by the pin. The harder the mechanic presses againstthe handle, the firmer and more positive will be the gripping action ofthe handle and the locking pin against the tool shank. This design oftool, and this particular locking pin, with the cooperating flatbeveledface of the tool shank, will permit the mechanic to exert a verygreat manual torque through the tool into the work being executed.

This invention, and consequent tools, is presented to fulfil the needfelt for interchangeable tools of substantial character and convenientto use.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

The combination with a tool provided with a shank having the innerextremity thereof formed respectively with tapered and beveled surfaces,of a handle for detachable association therewith, said handle g having alongitudinal bore and a transverse bore communicating with the innerextremity thereof, a transverse beveled rib formed across one wall ofsaid longitudinal bore adjacent its juncture with the transverse bore,said rib adapted to engage the bevel surface of the shank, and a pinextending transversely through said handle and having a portion of itsperiphery disposed within the bore of the wall opposite to the ribwhereby upon insertion of the tool in the handle, a frictional bindingof the inner extremity of said shank will be effected through theengagement of the beveled surface with the beveled rib and the taperedsurface with the periphery of the pin.

JOHN PEYER.

